3. Overview of technology sources

3.1 Data banks on chemical compounds

These are directories of substances or preparations, linked to bibliographic or factual databases. Compounds are identified by their nomenclature, trivial or trade names, various technical names, Chemical Abstracts Service (CAS) registry number (RN), molecular, global or semi-developed formula, ring analysis and chemical structure in the form of its fragmentary or topological coding.

In most files, compounds have a defined structure. These include :

• Registry File [Chemical Abstracts Service (USA)] containing over 10 million chemical structures;

• JICST-DC [JICST (Jp)]: chemical dictionary of 100,000 low molecular weight organic substances;...